trip from japan to china

I am debating to travel to china during chtistmas break and would like to ask advise which would be the safest and also a rather cheap way to do so.
I was wondeing if there are any japanes travel agencies that offer package tours to china, including flight and a sightseeing trip? Has anybody ever heard of something like that?
I am looking forwards for some suggestions
thanks

China is a continental country,what part of China do you want to visit ?

Much of northern China shower by snow in December,city of Harbin in Heilongjia province ( northern old Manchuria ) has annual snow festival is one winter tourist attraction.China's coastal region ( Jiangsu and Zhejiang provinces ) is another popular vacation destination for foreign travelers,namely Shanghai,Zushou,and Hangzhou.

I know Japanese take vacation tours to China's SW region,where they can sightsee local colorful Chinese aborginal minority townships.

China is one of the most popular destination for Japanese tourists, and there are many package tours offered various travelling agencies.

JTB
http://www.jtb.co.jp/kaigai/Citylist.aspx?CountryCD=C01&type=
H.I.S.
http://www.his-j.com/tyo/tour/index.htm
Kinki Nippon Tourist
中国旅行の海外旅行・ツアーを検索 | 近畿日本ツーリスト
Hankyu Travel
http://www.hankyu-travel.com/china/index.html
just for example.

Result of google for 窶吮??ﾂ坂? (china) + ﾆ恥ﾆ鍛ﾆ単ﾂーﾆ淡ﾆ団ﾆ但ﾂー (package tour)
http://www.google.com/search?hl=ja&q=中国　パッケージツアー&btnG=Google+検索&lr=